Revert "chore/remove-nsswitch-hosts"

This reverts commit 12b08de.

.docker/Dockerfile-alpine

@@ -7,6 +7,10 @@ RUN addgroup -S ory; \
 
 COPY hydra /usr/bin/hydra
 
+# set up nsswitch.conf for Go's "netgo" implementation
+# - https://github.com/golang/go/blob/go1.9.1/src/net/conf.go#L194-L275
+RUN echo 'hosts: files dns' > /etc/nsswitch.conf
+
 # By creating the sqlite folder as the ory user, the mounted volume will be owned by ory:ory, which
 # is required for read/write of SQLite.
 RUN mkdir -p /var/lib/sqlite && \

.docker/Dockerfile-scratch

@@ -3,6 +3,10 @@ FROM alpine:3.20
 RUN apk upgrade --no-cache && \
     apk add --no-cache --upgrade ca-certificates
 
+# set up nsswitch.conf for Go's "netgo" implementation
+# - https://github.com/golang/go/blob/go1.9.1/src/net/conf.go#L194-L275
+RUN [ ! -e /etc/nsswitch.conf ] && echo 'hosts: files dns' > /etc/nsswitch.conf
+
 RUN addgroup -S ory; \
     adduser -S ory -G ory -D  -h /home/ory -s /bin/nologin;